Investors poured a record $188 billion into U.S.-listed ETFs in 2012, beating the previous record of more than $175 billion set in 2008, according to a report published by IndexUniverse.

According to the company’s December 2012 ETF Fund Flows data, total ETF assets ended the year at almost $1.349 trillion, 27 percent higher than the $1.062 trillion a year earlier and 2.5 times as much as the $537 billion total at the end of 2008.

Other data from the report includes:

The 2012 year-end asset total, just shy of an all-time record of $1.350 trillion reached on Thursday, Dec. 20, also reflects the rise in global stock markets last year. The Dow, for example, rose 7.3 percent.

Of the $188 billion in 2012 inflows, $151 billion, or 80 percent of the total, came from the three biggest firms: BlackRock's iShares, State Street Global Advisors and Vanguard.

Last year's asset-gathering winner was the SPDR S&P 500 ETF (NYSEArca: SPY), the biggest ETF in the world. It pulled in $15.77 billion, or more than 8 percent of the total asset haul.

Bond ETF assets grew quite sharply in 2012, and the launch of Bill Gross' Pimco Total Return ETF (NYSEArca: BOND) on March 1 kept the phenomenon in sharp focus throughout the year.

Bill Gross' Pimco Total Return ETF (NYSEArca: BOND), the second-most-successful ETF launch in history after the bullion fund SPDR Gold Shares (NYSEArca: GLD), ended 2012 as the 10th-most-popular fund. It gathered $3.77 billion and ended the year with $3.87 billion in assets, making it the most successful fund launch of 2012.

GLD, the world's second-biggest ETF—with assets of $72 billion—ended the year as the No. 5 fund, with inflows of $5.75 billion.